summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-imx
diff options
context:
space:
mode:
authorShawn Guo <shawn.guo@linaro.org>2013-10-09 20:31:28 +0800
committerShawn Guo <shawn.guo@linaro.org>2013-10-21 09:39:25 +0800
commit1d674a73c59211cc33cb9c2954659033d8458fa9 (patch)
tree2fd57378f325703391c46ccd9c5d1d8ec95b5b6c /arch/arm/mach-imx
parent9e8147bb5ec5d1dda2141da70f96b98985a306cb (diff)
downloadop-kernel-dev-1d674a73c59211cc33cb9c2954659033d8458fa9.zip
op-kernel-dev-1d674a73c59211cc33cb9c2954659033d8458fa9.tar.gz
ARM: imx6q: call WB and RBC configuration from imx6q_pm_enter()
The WB and RBC configuration calls are currently made from imx6q_set_lpm() for WAIT_CLOCKED and WAIT_UNCLOCKED mode with a simple state tracking. This becomes unnecessary since we can make the calls from imx6q_pm_enter() directly now for suspend. More importantly, the current call of imx6q_enable_wb() from imx6q_set_lpm() is buggy. The CLPCR register bits configured by imx6q_enable_wb() will get lost, because imx6q_set_lpm() caches the same register and write it back at the end of the function. That's why the imx6dl suspend/resume does not work currently - the wakeup from suspend triggers a reset on imx6dl. Moves the WB and RBC calls into imx6q_pm_enter() to save the state tracking and fixes above bug, so that suspend/resume can start working on imx6dl. Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Diffstat (limited to 'arch/arm/mach-imx')
-rw-r--r--arch/arm/mach-imx/pm-imx6q.c19
1 files changed, 4 insertions, 15 deletions
diff --git a/arch/arm/mach-imx/pm-imx6q.c b/arch/arm/mach-imx/pm-imx6q.c
index 461a895..fb7d90d 100644
--- a/arch/arm/mach-imx/pm-imx6q.c
+++ b/arch/arm/mach-imx/pm-imx6q.c
@@ -67,10 +67,7 @@ void imx6q_set_chicken_bit(void)
static void imx6q_enable_rbc(bool enable)
{
u32 val;
- static bool last_rbc_mode;
- if (last_rbc_mode == enable)
- return;
/*
* need to mask all interrupts in GPC before
* operating RBC configurations
@@ -98,17 +95,11 @@ static void imx6q_enable_rbc(bool enable)
/* restore GPC interrupt mask settings */
imx_gpc_restore_all();
-
- last_rbc_mode = enable;
}
static void imx6q_enable_wb(bool enable)
{
u32 val;
- static bool last_wb_mode;
-
- if (last_wb_mode == enable)
- return;
/* configure well bias enable bit */
val = readl_relaxed(ccm_base + CLPCR);
@@ -121,8 +112,6 @@ static void imx6q_enable_wb(bool enable)
val &= ~BM_CCR_WB_COUNT;
val |= enable ? BM_CCR_WB_COUNT : 0;
writel_relaxed(val, ccm_base + CCR);
-
- last_wb_mode = enable;
}
int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode)
@@ -132,8 +121,6 @@ int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode)
val &= ~BM_CLPCR_LPM;
switch (mode) {
case WAIT_CLOCKED:
- imx6q_enable_wb(false);
- imx6q_enable_rbc(false);
break;
case WAIT_UNCLOCKED:
val |= 0x1 << BP_CLPCR_LPM;
@@ -152,8 +139,6 @@ int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode)
val |= 0x3 << BP_CLPCR_STBY_COUNT;
val |= BM_CLPCR_VSTBY;
val |= BM_CLPCR_SBYOS;
- imx6q_enable_wb(true);
- imx6q_enable_rbc(true);
break;
default:
return -EINVAL;
@@ -175,6 +160,8 @@ static int imx6q_pm_enter(suspend_state_t state)
switch (state) {
case PM_SUSPEND_MEM:
imx6q_set_lpm(STOP_POWER_OFF);
+ imx6q_enable_wb(true);
+ imx6q_enable_rbc(true);
imx_gpc_pre_suspend();
imx_anatop_pre_suspend();
imx_set_cpu_jump(0, v7_cpu_resume);
@@ -183,6 +170,8 @@ static int imx6q_pm_enter(suspend_state_t state)
imx_smp_prepare();
imx_anatop_post_resume();
imx_gpc_post_resume();
+ imx6q_enable_rbc(false);
+ imx6q_enable_wb(false);
imx6q_set_lpm(WAIT_CLOCKED);
break;
default:
OpenPOWER on IntegriCloud